FIG. 7.

Resistance of the ΔxthA mutant of SE2472 to egg albumen. Wild-type strain SE2472, the ΔxthA mutant, and vector pRB3-273C- and plasmid pRB3xthA-transformed ΔxthA mutants were incubated with egg albumen at 37°C. The survival of bacteria was determined by plating, and the bacterial concentration was plotted against incubation time. At least three experiments were performed, and the results of a representative experiment performed in triplicate are shown. The error bars indicate standard deviations and are within the symbols in some instances.